It looks like an older Kioritz 21 cc . I aquired an older McCulloch weedy just like that one.It ran good as well , but it would be better to convert to CDI Ignition-I ran mine with a 15x6 prop and it ran OK did'nt tach it though it did not like to rev up to quick with that prop,your's may run better that mine did-it might do good on a .60 size-ish floater high wing style plane.I am going to use the one I have to make an RC air boat.